How to restore the operating system to a previous state in Windows XP?????????
Yes you can restore your operating system to a previous state in windows XP very easily. Most of the XP users perform this step to backup their data. Some times your system files may be infected and you cannot see those files. To prevent this situation you can do system restore tool to return your computer to a previous working state.System Restore takes a snapshot of critical system files and some program files and stores this information as restore points, this is how programming runs inside the operation system.
Following procedure explains you How to restore the operating system to a previous state in windows XP:
1. Log on to Windows as Administrator. After entering into windows click on Start-> Point to all programs-> Accessories-> Now point to system tools.
2. After opening System Tools click on System Restore. System Restore starts.
3. A welcome page opens for system restore. Now click Restore my computer to an earlier time (if it is not already selected), and then click Next.

How to Hide Shared file in windows XP??????

If you are having number of computers in your office that are all networked togather and share the same internet connection and you want to maintain secrecy for your files, that is you want to hide from other users on the network from accessing your data?? Yes if you feel insecure than you can easily hide your shared file in windows XP from accessing other users on the network. You can assign network passwords in Windows 98 but in windows xp you can’t do that. Basically Windows Xp is having one feature with shared files. That is share all or share nothing. But Windows XP doesn’t have a feature which can secure a single folder. Well from the below trick you can hide shared file or folder in windows xp.